Imager Technical Information

Update Policy

modified: Jul 18 2007

• Update policy applies to Imager computers on subnet 54.
• The imager tech members will decide upon conference freeze periods. To determine these periods, a calendar of conferences will be consulted. This calendar will list the freeze periods and the machines to be frozen during each period. Tech staff will check the calendar for freeze periods and will not update the listed machines until the freeze period is over. No updates (including security updates) will occur on listed machines during their freeze periods. * There will be a 48 hour notification on updates during non-frozen times. The updates will be tested on 'tom' first, and 'tom' will generate an email to imager-tech when it is upgraded.
• Look at the file /var/log/yum.log to see a list of recent updates to Linux machines.

Imager Filespace

modified: Mar 28 2007

• The imager filespace is located at /ubc/cs/research/imager .

What changed with NetApps

modified: Jun 20 2007

• NetApps documention link: http://www.cs.ubc.ca/local/computing/accounts/backups.shtml
• Recommendations for setting permissions: For most files = -rw------- (default, allows only you to read and write them.) C/C++ programs and other programs = -rwx------ (also default, allows only you to read, execute and write them.) See the man page on umask for information on how default permissions are set. For more information go to: http://www.cs.ubc.ca/local/computing/unix/permissions.shtml

Joint Admin Model

modified: Jul 18 2007

• The Joint Admin Model exists for Imager machines so that representatives have admin privileges as well as the tech staff. One representative per OS has sudo access. This is currently Tibi for Linux and David for Windows. Sudo access can be used in emergency situations. When performing a sudo access, the representative needs to notify the tech staff by email. The tech staff will keep track of sudo accesses and will report un-emailed incidents.

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